For all of the packaging that I have purchased (for a consumer goods company) there is an economic order quantity based upon, usage, price and inventory carrying cost. Packaging lot size is a big driver of price, often driven by tooling, mold/jig costs and set up time. Bottom line is if you don't buy a lot of one package, it's gonna cost you. And packaging is usually a pretty high percentage of cost of goods. Hence the desire to keep packaging costs down and standardize. In laundry detergents the high cost is the mold, which is why many companies have standardized on bottles and only change plastic color and labels to differentiate products. Metal tins/can are similar. Can stock is expensive as is tooling and pipe tobacco companies are very small players for the big can/tin suppliers.